Fluid-operated drill-sharpener.



J. G. LEYNER.

FLUID OPERATED DRILL SHARPENBB.

APPLIOATIOH FILED JUNE 8, 1907.

' Patented Apr. 13. 1909.

3 SHEETS-SHEET 1.

J. G. LEYNER.

FLUID OPERATED DRILL SHABPENEB.

. I APPLIOA'I'IOH FILED IUIE 8, 1907. 91 7,777..

3 SHEETS-SHEET 3.

Patentem Apr. 13. 1909.

R E N Y E L G L FLUID OPERATED DRILL SHABPEHEB. uruonxor nun Jun a, new.

UNITED STATES .romq GEORGE LEYNEB,

OF DENVER, OOLORADQ.

FLUID -OPEBLTED DRILL-WERNER. I

Tolall ivllom it may concern: it known that I J OHN Gnonor: LEYNEB, a citiaen.of the United Statesof America, reslding in the city and county of Denver and State of Colorado, have invented newand 1 useful Fluid-Operated Drill-Sharpeners, of

p which the follo is a specification.

- [My invention ates to a fluid controlled drill sharpener, and the objects ofmyinvention'are: First,'to rovide a fluid or neuinatically controlle and drill sha ingmac e.. Second, to: rovide a fluid or pneumatically contro ed vise for 'pping and holding a drill. 16 rovi e a fluid or' neumaticall'y controlled sharpenerinw jaws ofthe drill holding vise-is 'controlled by. fluid re to grip, hold, and release a drill. Fourth, to provide a fluid or pneu- 20- matically controlled piston operated drill holding vise and a hammer piston driven rocating dolly for sharpening a drill. to (provide a fluid controlled'piston operated rill holding vise, and a reciprocathammer piston operated dolly controlled by a manually, operated throttle valve. S1x th,to provide a drill'sharpener havin a 'fixed jaw and a movable jaw, said mova le jaw being actuated to move'to and from the S0 fixed jaw, and to rip and hold a drill'by fluid pressure, preferably compressed air, and to provide a reciprocal movement drill striking dhlly ted to be driven on its drill shar 7 stno es by ahalnmer piston, and to 8 5 on its 'moperative strokes bya'resilient device, and adapted'to reci rocate independent of thereciprocal'stro es of said hammer piston, and to provide a manually throttle valve arranged to control 40 and actuate, by a continuous l'hovement,

. stidmovable jaw of said vise and said hammer piston substantially simultaneously, but

to actuate said vise in time enough before the hammer piston is started to enable said jaw 'andhold a drill bit in operativestriking zfiation to said dolly. "And seventh, to provide a simple, durable, accurate rock outdie holding and dolly strikti gf j :coiiipresse air or other fluidcontrolled 150 an ope rated Idrill-bit sharpener for the rock cuttingdrill bits of rock drill' engines. I attain these objects'by the inec amsm illusmud in the accompanying drawings, in

i5 1 is a front elevation of the im-' roved dril sharpener. Fig. 2. is a rear ele- Bpecifieatien of Letters r ms. ums filed June a. no". suitin 311,9.

' vation .of the same.

drill grip and old-' ch one of the Patented April is, 1909.

Fig. 3, is a central vertical, sectional view thereof, showing a drill I /clamped in position for she. ening. Fig. 4

is a side elevation of the rillholder and sharpener detached from its supporting similar to Fig. 4, the drill siarpener be omitted, and the valve casing being remov to show the ports which admitthe actuating fluid into the cylindenabove and below the piston; Fig. 6, is a central vertical, secstandard. Fig. 5, is a'slightl enlarged view tional view through a portion of the ma-.

of its downward movement, andmeans bemg shown for preventing axial movement'of tical sectional view through the valve casing, showing the portsn said casing for admitting the actuating uid'to the lowerand ener, the exhaust port also being shown, t e casin .bein detached, from the side of the cylin er. ifi. 8, is a vertical sectional view, taken throug the axial center of the valve casing, showin the valve and its stem and the ports for under side of the piston. Fig. 9, is a front elevation of the fluid controlling valve. Fig. 10, is a rear 'elevation ofthe same. Fig. '11, is a side view of the valvesteln. a front view of the dolly holder an guide. 13, is a plan view of the piston,'the drill ho ding 'die which is secured in the upper end of its stem being removed. Fig. 14, is a front elevation of a air of drill holding dies of a form adapted or hold' a hexagona view through Fig/14.. ig. 16, is a front view of a pair of. drill holdmg dies designed controlling valve.

Similar characters of reference refer: to similar parts throughout the several views.

Referring to the drawings, the numeral 1, designates the supporting stand of m fluid controlled drill sharpener. This stand comprises a floor or foundation base 2, a hollow table portion '4, all of which are preferably Fi 12, is

chine, at right angles to the-line of section shown in Fig. 3, the piston being at the limit the. said piston. Fig. 7, is a transverse verupper ends of the cyhnder, and to the sha inittingactuating fluid to the drill. Fig. 15, is a lo 'tu inal sectlonal 19 is a to plan view'thereof. And Figs. 20, 21, an 22 are diagrammatic views illustrating the three positions of the fluid 11avertical column or standard 3, and a top or I 40 'cular made of circular form. Upon this supportstand,- I place the dn 1 sharpenerand sets-on and is'secured to the table port-ionof '5 ,the stand by anfsuitable means, but preferablyibybolts or cap screws 6. This cylinder is'o at its bottom, the table portion forming its lower cylinder head, and it is closed at its upper end by an integral head 7. This cylinder is rovided with an axial bore or piston cham er, in which a piston 8 is reciprocally; mounted, and which is provided with 4 ashort piston-rod or stem 9, that extends through an aperture 10, formedin the upper .15 head of the cylinder.

- A vertically projecting standard 11, is form on the top of the cylinder, having a cent bore 1-2,'which forms a continuation of the aperture 10, in the upper cylinder head [Theflthickliess of this standard is less t the diameter of the iston stem, hence itsbore. 12 is formed in ametrically opposite .sides of the standard, while the piston f stem. projects laterally through the opposite of the standard as shown. The upper end of the piston stem, however, is'reduced width to correspond to the thickness of the standard, and in this upper end is formed a 1 recess in which is secured a drill holding die 13- suitable distance above the end of the piston stem, and inits u per end is secured a block 14, by bolts 15, w ch pass down through the top of the standard into threaded holes in the $5 block, and the block has a recess in its under side, in which is secured a die 16, which is a counte -art of the die 13. I The recess in the end of issecured, comprises two abutting semi-cirrecess' maller dianieter, extends practically through two-thirds of the thickness of the end of the piston stem, and terminates at the be of the: recess 18, of larger diameter, whic recess extends to the opposite face of the end of'the stem. The shoulder 19, at the 'uncture of the two.recesses, is under-cut as s own in Fig. 3. The block 14, has recesses 20, and 21, and an-under-cut Rio-shoulder 22, exactly corresponding respectively to the recesses 17 and 18, and the under-cutshoulder 19, 'in the end of the piston stem, and when the stem and block are adj acent to each other, as shown in Fig. 18, their respective recesses form a circular hole or bore of two diameters. Bolt holes 23 and 24 are formed respectively throughthe end of g the valve stem, and the block 14, and ends of these holes ad'acent to the larger semi-circu- 60 lar the'saidstem and block, are counter-Bored as shown 8t-25, the counterbores cutting through the said recesses 18 ZI-"fior a purpose to be presently ex Thedieal3andl6,areformedwithse1nier, which comprises a cylinder 5, which- 32, which coincide with the bolt hole co e bore or guideway 12, extends a e piston stem, in which the die 13,

of difi'erent diameters. The

' whichlie within the semi-circularrecesses 17 and 20; and also with-members 28 and 29 res ectivel which lie within the recesses 18' 21. ey are also formed. with under-.- cut shoulders '30 and 31 respectively which dove-tail upon the shoulders 1 miss-, the stem and block The larger ends ofthei dies are formed with semicircular terhores 25, and when the dies-are laced position, as shown in Fig. 3, and be ts seem vpassed throng'h'the 'ho'les inlthe lock, their heads lie partially in'fthe counterbores 25 and inthe 32, inthe'; endsfpf the dies, and when nuts are. screwed plpon the ends of these bolts, th y e und er-cutshoulders of the dies-to or lock one upon the other, so-th'at'the Bald dies will be securely held in their 83} The two dies have each a half hex on shaped recess34, formed in them, and w on the dies are placed together these will register and form a complete hexagonal here. The two half parts of 'the die:- are further providedwithconical 35f which are concentric with the i hexagonal bore, and which converge from the front end of the die into thehexagonal bore, as clearly shown in Fig. 15, .TlllS hexagonal herein-J5 thedie is made'large' enoughto grip the standard size hexagon tool steel use which .is used the dies should have a round gnpping a rture through'them, and this axial p aperture" in the 'die is made a s er than the diameter of the tool steel-foo that the jaws will grip it firml 1 InFigs. 16- and 17, I have idustrateda' of dies 36 and 37, which are adapted to 'l iold a drill steel that is cruciform in cross section in all other respects these dies are the same as them shown in F' .14 and 15.- The cyl inderis provided a valveichest 38, which comprises a flange portion '39, thatls bolted or is otherwise 'securedto a base portion formed on the side of theft linder, and acylindrical ortion 41 forms t 1 1H ortion. v is cylindricalportion 41, is ormed with a valve chamber 42, thatjenf tends into it from its front side, in valve seat 43 is formed, and adisk' valve 44 is placed in the chamber and seated against" the valve sea-1M3. The entrance to thevalve chest is threaded, and a.v cover 45 is t jadedto. it and is provided with 'a' hexagonal wrench reeeiv' portion by which-the cover mag be screwe into it. aperture is ormed through. the cover, and ai -valve stem 46 extends into and through thecap and is coup-led to the valve, and to its outer end a ban 0 47 isfsecuredQ .The valve 44 consists of a hub 48, formed 18.

inwardly projecting rim 49 is formed around the circumferential edge of the valve,

which also extends radially to the hub from the two points where the circumferential edge terminates, and when the rim. lies ainst the valve seat, as shown in'Fig. 8, a timber or port 50, is formed between the valve and its seat, the purpose seat is ormed with an axial'bearin hole 51,

and the ad'acent face of the valve rub 48, is

end of the valve stem, by whic formed wit a circular lug or stud 52, which projects into the hole 51, and supports and centers the valve relatively to its seat. The opposite face ofthe hub is formed with a groove 53, which receives a rectangular head 54, formed on a circular flange u on the inner T1 the disk is rotated when the stem is turned.

Diametrically opposite stop lugs 5.5 and 56 are formed on the wall of the 'valve chamber,

- through the v the valve, which is designed to e stop lugs to limit in each direction,

a on ped packing and a tail or'projection 57 is formed at a suitable point on the circumferential ed e of aget ese the movement 0 the valve as will more fullyappear. A threaded axial counterbore is formed in the inner face of the ca 45, which receives was er 58, which surroun the stem 46, and a cupped packing nut59 is screwed into the counterbore over the washer 58. The flangeon the end of the valve stem lies between the nut 59 and the face of the valve hub, and revents the head 54 from becoming detaches from the groove 53 in the valve hub.

The valve seat 43, is formed with inlet vports 60, 61, and 62, and with an exhaust port 63. The ort 60 extends horizontally alive chest and communicates with a vertical port 63 in the inner face of the valve chest, which extends down adjacent to the'bottom of the chest and communicates with a port 64, which extends through I ple 65, onthe side extends throu h t the side of the cylinder 5, below the piston 8. The port 61 extends through a threaded nip of the valve chest, and connects with the cylinder of a neumatichammer, as will ap ear later, andt e ort 62 e valve chest an com municates wit a'vertical port 66, in the inner face of the chest, which communicates with a port 67 which extends ithrough the c linder 5, at a point above the iston 8. e exhaust port 0 ens out throng the end wall of the valve c est as shown in Figs. 7 and 8, and an inlet ort 68 is formedthrough the side of the v ve chest,'which .ort is threaded to receive a nipple, whichus connected by a-hose 69 with a source of fluid unde%n'essure. I w

' en the machine is not operating, the

Fig.9, the piston 8 is tween the two is provided with'a cireul 'the bore of the cylindriealhub an valve stands in the position shown by dotted lines, Fig. 7, and as illustrated in Fig. 9, in which position all the ports are closed, and in communication with the valve port 50, and the vertical terminal edge of the valve will be parallel with the port 60, while the other terminal edge will be parallel with the port 62. These terminal edges stand at an angle of about 60 degrees to each other, thereby form- ,ing a gap or recess in the valve whereby the r of which will be full explained hereinafter. The valve,

ports are uncovered andcomniunicate with valvechest, as the valve is turned.

With thevalve in the position shbwn in I cylinder 5, and consequently the drill'holding'die 13 is at thelinnt of its movement below the up r die 16. To operate the machine, a dr 1 is placed in the die 13, and the valve is moved to the position shown in Fig. 20, when the operating fluid to'the under side of the piston, which will be forced up, and the drill will be clamped he dies. A further movement of the valve to the position shown in Fig. 21,

will be admitted at the lower end of the will uneover'the 1port 61, and admitthe opcrating fluid to t cylinder of the dolly operating iston hammer, which be at'ed to s rpen the drill and by reversing the valve to the position s own in Fig. i22,; .'the fluid beneath the piston will exhaust through the valve port 50 and'exhaust port 63,.and theport .62 w' beuncovered and fluidadmitted abov'e the :'piston 8, which moved down and the drill released, as will all be more fully explained hereinafter.

The rear end f with an integral vertical standard 70, which ar aperture 71, in alinernent with the axial center of the Within the aperture 71,I insert the hub rtion of a hammerpiston cylinder 72. e cylinder is formed with a circular flange 73, at one end, from which the hub projects, and the .hub is inserted from the rear side of the standard, and theflange is bolted torthe standard b extend through and beyon' the standard. .I also secure side of the standard, which is the front side, a dolly, guide andsupport 75. Thisguide comprises a flange 77, which is bolted-the standard by the bolts 74, ands projecting head'78, provided with an axial bore 79, that is positioned in a ement with the dies the hammer piston cylinder. Diametrically opposite slots 80- extend ina horizontal plane from the forward end of the head to the bolts 74-, which flange 77, and a drillfllip forming punch or dolly 81, is reciprocally mounted in the bore 79-. This dolly comprises a shank portion 82, which is fitted snugly but reci rocallyin r a lip cutting head port-ionof, greater The shank is made long enonghto extend through the other ide ofm to the oppos e the cylinder is provided 7 gripping dies when they areqin the position. shown in Fig. v1.

the agertu're in'the' support into thehammer .cylin er .and;into"the'path of a hammer-piston 83 reciprocally mounted in the cylinder 12.. e lip end or head portion of the doll is roun and the dollies are forn'iedwith o varying diameters to meet the rehigements of the being sharpened. v cutting li oithe dolly are arr ed rs-- .dially'upon t e'faice ofits head, w ich is .10 made at right les to the axial centerof the doll and-the fii s extend 'from'the' center ofthedollys' head to-its periphery consequently they willform acircumferential row.

of radially-arm -endof a drill, .pref.e,rahly emp oy a fulltriangular or'iirverted V-sbaped rock cutting 'p on thedolly, and'form the dolly with preferably four five or six of these lips. My

, Invention, however',-eontemplates the use of .dollies having any desired number or slnpe .of rock cutt' lips, arranged in an desired manner and with the head of the do y of any form, and ads ted to form a rock cutend on or-to res arpen .solidor hollow.

' 'steel or-drill bits. 1

pneumatic hammerpiston cylinder is provided with a 'removab e rear c linder head 84, which is preferably threade to the cylinder .andsis provided with a wrench .30 recei f nut? The hammer iston is'made in two 'amgters-and thecy d'ers-bore is consequently made in two diameters. The larger diameter of the hammer piston forms about one-thfid oft-he lengthof its smallef 85 -diameter and a square shoulder 85 is formed it, the junctionof the, largerand smaller portions of the piston. 1 An axial aperture is formed'in the rear end' of thehammer piston, which extends into it from 40 its rear end to. near its fi-ontend,--and a circumferential row ofport holes 86, 'is formed radially through the shell to intersect the inner terminal end of this axial aperture. I preferably use but four of these radial ort holes and preferablyplaoe each pair of them at diametricallyop osite centers to each other through the she I and eachat a slight distance to one side. of the other part.

The cylinder is arranged to reciprocally support the piston, and an air'inlet port 87 is formed in it, to which is connectedone end of a pipe 88, which connects at its other end with the-fluid supply port 61,- of the valve chest 41, the pipe being: connected to the nippie bya union 89. The forwardly projectlng hub portion 71 "of the c linder. 72, is provided with an axial cham er .90, which. 1s made a little larger than theTdiam-' eter of the striking end of the hammer piston orthe rear end of the shank of-the dolly. The shank of the dolly extends into; this chamber, and the s end of the ham- '92, t e opposite ends of whi mer piston extends mto it on the forward strokeof its reciprocal movement and strikesthe shankend ofthe dolly, will be understood b reference to Fig. 3.

In Fig.3, t e hammer piston is'in position F asses into the bore. of t e hammer.-

piston, t ough the ports 86, and drives the piston forward against the dolly, and as the ports 86 pass within the chamber 90" the uid exhausts into said chamber and out through an,exhaust port 91. The fluid thenexerts a pressure upon,the shoulder 85 0f to be struck by said piston on each forward V a.

stroke and driven against the opposing end of the drill bit. It is necessary, however,

the hammer piston, and drivesit rearward d-rock'cuttingh son-the again, v

The dolly is reciprocally mounted in its that the dolly be held normally within the reciprocal striking path of thehammer piston, and that after being struck and driven against a drill bit, it should be instantly returned independently of the. rearward movement. of the hammer piston, as it is essential that the rearward movement of the dolly be free and independent of thereoiprocal'movement 'of the hammer piston, and

yet at the same'time be as positive andquick and have a resilient variable throw within.

the limits of 'its full reciprocal stroke vso that if the burying of its lip mto thesoft hot steel of a drill bit should make'it slightly'slower in its return stroke than the hammer piston, 1

it would still make the greater portion of its return stroke before the hammer --.piston again struck it, but normallyit should make its full'return stroke. slightly. quicker than the hammer piston makes its backwardstroke and be in position toireceive the full force of the hammer pistons forward stroke.

There are a number of ways by which the dolly could be automatically returned indev pendently of the. hammer piston after being struck by it, and the invention contem lates any means by which this featu re may e accomplished,

feature of m invention in the following manner: Throug the shank of the dolly is assed a steel pin 82, which extends throug and ut. I'preferably carry out this beyond'the op osite sides of the said shank .far enough to orm trunnions' which arear ranged to extend'throu'lgh and beyond the slots 80 in the head. hese trunnions are enga ed by t he free ends of a may cured in any desired manner to the standard 70, but which I preferably secure by removably clamping them between a plate 93 and the. top of a' boss 94iformed on the standard intermediate of the ends of the springs and arranged. der contractive to on which ppir of 5 rings 0 se- 4 70, by a cap screw 95, a coil 96 being formed heated in a-for they arranged to exert -to hold the shoul- --der formed at the 'unction of the head and shanekisortions of t edolly normally against of its support and the inner end of its shank in the striking path of the hammer of the shank of the dolly,

. .l;;' m at' act as eather keys, and hold the dolly gez agnmrmmive movement. The peripheral hammer iston and the dolly be operated -wh en a it isnot laced in jaws in strikrelation to the do y or be operated when a bit isnot in the 'aws, the beveled peripheralsurface of the ead of the dolly will lln' strike in the beveled tapering entrance tothe vwhich will receive the spent blows of the qdollywithout injuring the llPS of the dolly. Inorderto prevent the piston 8, from turnthe cylinder 5, a pin 97,- having "lower endyis driven into a hole in 98', formed on the upper edge of the j until the shoulder formed at the juncof the 'two diameters of the pin rests "."upon the tiip of theboss. The rejecting end of this pin extends into a gui ehole 99,

, which extends through the top of the cylinder and into an enlargement 100, formed on th e 11. The pin 97, which is par the hole when thepiston is 1 pass up into the hole, as the piss-and thus prevent it from, turning thejcylinder-L I P Upon the forward portion of the cylinder {yrs-formed a hub 101, having a'threaded a hole, in whi one end of a bar or tube "h screwed. This bar extends forward e'l'with the direction in which the drill Xe'xtends, when clamped, and upon it is l- L" ably mounted one end of a drill support- 103, which is provided with a set screwitosecure the said arm at any desired j point of thelength of'the bar 102.

opposite end of the arm is provided wiIJhWV-shaped recess, which is arranged in 5Q alinem'ent with the axial center of the i r half diel6, and is arranged and adaptff 1429 support the rear ends of the drill bits so hat-may rest in horizontal alinement the center of the dies when gripped by a rock cuttingdrill bits to be resharporthe-drillsteelin drill lengths ulpon jihicliit is desired to form rock cutting ips, to a suitable de cc of and each d the dies and gripped and held there gtho; nmmatic: ressu're of the upwardly piston, an the rock cutting lips are in the radial slots of the -cylin-' it against t bit or drill stee is in'- by the reciprocating dolly,

which is operated by the reciprocating piston 83, mounted in the cylinder 72.

The operation of my pneumatic drill sharpener is as follows: A supply of compressed air under the desired ressure is led from a source of supgly to t e air inlet aperture and port 68, t ough the pipe or hose- 69, a fragment of which 15 shown in Figs. 1 and 2.

.The handle 47 is then moved in the direction of the arrow-Fig. 4 to. turn the valve 44 to the position shown in Fig; 20, when the actuating fluid willpass through ports 60,

63 and 64,?to the lowerend of the cylinder 5, below the lpiston 8, which will thereby be raised" to t e position shown in Fig. 3. -A

drill bit or a bar of'drill steel, the point of which is to be resharpened, or on which anew rock cutt' point is to be formed, is

previously place in the lower half die 13, so

that its end to be shar ned is just about even with the front on .of the die, and the iston rises uickl and clamps the said drill be ha f die of the block 14-. In

practice, I preferably use a ressure of about 80lp'ounds er square inch, ut less pressure wi hold tli pressure is so make indentations intoa cold bar ofv tool drill steel. This position of the valve-allows the ,drill steel to be clamped between the dies 13 and 16, before the actuating fluid is.

e drill bits satisfactorily. Thisgreat that the half dies will admitted to the cylinder of the piston hammer. The handle is then pushed in the same direction, until-the tail 57, of the valve; engages the stop 55, when vnot only the port 60 ut the port 61 also will be opened, and the.

actuating fluid will pass through port 61, pipe 88, and inlet 87, to the hammer piston. cylmder 83, and accomplishes thereci rocatlon of the hammer piston to strike the olly, in the following manner; I

The piston hammer being in the position shown 1n Fig. 3, the actuating fluid, which is preferably air,- on entering the cylinder passes into the bore of the iston hammer through the ports 86, and ives the ham: mer forward by driven against and into t e hotend of thidrill, upsetting it so that it fills the bell; shaped entrance to the dieand forces its li s into it and forms a set of circumferentia y and radiall arranged V-shaped rock cutting lips on sai drill similar in every respect to its own lips. The very rapid reciprocative movement of the hammer piston causes the dolly to strike with great rapidity against the drill bit, and the springs-92 drawthe dolly back after it strikes each blowythus the dolly automatically assume's its normal position after each blow independently of the air controlled reciprocating movement through the ports 86, into the chamber 90,

against thedoll which is there f 3 controlled vise for bold] and thence to the atmospherethrough the i peated. Y

When the drill has been properly sharp ened; and it is desired to etc the piston hammer and remove the said drill, the handle 47 is reversed and moved until the tail 57 on the valve 44 contacts with the stop 56, when the valve will be in the position shown in Fig. 22, and the air beneath the'piston 8 will exhaust through ports 64, 63, and 60, into the valve ort 50, and thence through the port 63 to t e atm .s At the same instant, air will be a u 'tted above the cylinder through ports 62, 66, and'67, and the iston will be forced down until it is stoppe b a sugiporting lug 4, upon the piston lies 4, w ch insures an open a ace between the said headand the plSt0Il,;:'t0 permit the entrance of air. My vention contemp tes broadly an air a drill bit, and a reciprocating blow stri dolly actuated an 'controlled hammer piston, and means for actuating the dolly on its inactive strokes in such a manner that it will have a resilient com nsati movement independent of the air oontro ed movements of the piston hammer.

While I have illustrated and described the preferred construction and arrangement ofmy pneumatic drill sharpener, I do not wish to be limited to the precise construction and arrangement shown and described, as many ch ht be madewithout departing from the spirit of. my invention. 7

Having described my invention, what I claim as new, and desire to secure by Letters Patent is:

1. In a drill sharpener, the combination of a supporting base, a cylinder arranged to form the upper part of saidbase, and provided at its top with a fixed vertical standard, a block fixed in the top of said standard, 1;, .a removable drill-bit clamping die in said block, a reciprocating piston in said cylinder having a vertically pro'ecting stem, a 'die in the end of said stem in f with the fixed die of said standard, a valve chest on said cylinder, a system of fluid inlet andexhaust orts extending from said valve chest to sai pic'- ton, and a manually operated valve in said valve chest arranged to control said ports to gperate said piston to grip and hold a drill- 2.'In a drill sharpener, the combination with a su orting base, a cylinder provided with a drill su (port' arm, a yoke-shaped standard on em cylin er, a die at the upper end of said standard, a flu d controlled piston rocally mounted in said cylinder having p a vertical stem, and a die in the end of the 'cluding a handle for manually operating said stem, said dies being formed with a", combined drill-bit shank gripping portion and 1a conical diverging tapering portion adapted to form an enlarged tapering head portion on drill-bits, an arm on said cylinder, a hammer piston and cylinder mounted on said arm, a I drill sharpening dolly reciprocally mounted to reject into said cylinder in thereciprocal pat of said piston, and arranged to face the conical end portion of said (lllll bit gripping dies, a valve chest on the-cylinder, a system,

i i ports extending from said valve chest J0 said'cylinder and p ing hammer piston cylinder, and a manuall operatfl valve in said valve chest arrange to control the ports leading to said c linders.

3. In a drill sharpener, tli a supporting base, a. cylinder mounted on said ase, a drill holding vise supported by said cylinder, 9. piston insaid cylinder forming a part of and arranged to control said vise to ho d a drill, a hammer piston cylinder supported upon said first cyhnder, a dolly reciprocally' mounted infa support adjoining said hammer piston cylinder, means connected with-said cylinderand including a hammer" iston in said cylinder for driving said dolly orward, a valvefhest secured to said vise operating cylinder, :1 valve-seat in said valve c est provided with fluid orts which lead from said valve seat to sai cylinders, a disk valve seated in said valve chest against said valve seat, an expansive fluid inlet and exhaust port in said valve chest, and means invalve to control the ports of said cylinders and thereby operate said drill gripping to hold a drill, and said hammer piston and dolly to sha n a drill. 1 4. In a flu1d controlled drill sharpener, the combination with a sup orting base, a cylinder secured upon said ase, a piston in said cylinder having a vertical sleeve, a bracket on said c linder,'al1a1nmer piston cylinder supporte upon one side of said bracket,'a support secured to the o posite side of the bracket, a dolly reciproca y mounted in said support in alinernent with said hammer piston cylinder, means including a hammer piston in said cylinder for dri said doll forward, a valve chest on the t'cylin er, a valve seat in said 'ehest, a system of -fluid inlet and exhaust .ports' leading into and from said valve chest and from sald valve seat to said cylinders and from said cylinders to the atmosphere, a disk valve in said valve chest seated against said valve seat, 'an axial valve stem extendin through and beyond said valve chest an secured at its inner end to. said, valve disk to rotate the same said chest on said valve seat, ahandle on the outer end of said valve stem, said fluid ports being arranged in progressive order in said valve seat and concentric to the center, a recess being formed in said valve whereby 130 e combination of said ports are uncovered as they register with the recess, and an exhaust port in the under side of said disk valve, reglstering with said ports in o erative order.

5. In a uid controlled drill sharpener, the

combination with a supportin base, a cylinder having a piston operate drill holding vise, mounted on said base, a valve chest on said cylinder and a manually operated valve disk in said chest, a system of fluid inlets and exhausts in said valve chest leading to said cylinder, of a pneumatic hammer cylinder and hammer iston supported on said first cylinder, a do y reciprocally mounted in said cylinder in operative drill sharpening relation to said vise, and a fluid conveying tube connected at one end to said valve chest and at its opposite end to said hammer piston cylinder, and arranged to admit air to said ham mer piston to drive said dolly on its drill sharpenin strokes.

6. In a uid controlled drill sharpener, the combination of the supporting base, of a cylinder mounted thereon, a piston in said cylinder, a drill holding vice o erated by said piston to grip and hold a rill, a dolly operatively supported in drill sharpening relation to said vise, with the valve chest rovided with a circular valve seat, a iskshaped valve pivotally mounted in said valve chest, and seated against said valve seat,

there being a recess in the periphery of said valve disk, an exhaust port in said valve disk, and an operative system of fluid inlet and exhaust ports arran ed concentric with 5 the axis of said disk .va've and its exhaust port, said recess permitting said orts to be ,0 ned as the valve is rotated, an means inc uding a manual] operated handle for ro- 40 tating said disk va ve to 0 en and close said ports to admit actuating uid to said cylinders and pistons.

7. In a drill sharpener of the character described, the combination with a standard,

.of a cylinder mounted thereon; a piston in said cylinder, and means for preventing axial first mentioned cylinder; a seat formed in die in said standard in line with said iston-s die; with a bracket at the rear of sai standard, having an axial bore; a support secured to'one side of the bracket, 118N111? an axial bore in line ith the bore of the bracket, a dolly reciprocally mounted in said support, an operative hammer piston cylinder supported by said bracket, a hammer piston reciprocally mounted in said cylinder and arranged to strike said dolly on its forward stroke; a valve chest on the main cylinder, hav' ports leading to the u per and lower end d? the main cylinder and to the atmosphere; a pipe connecting one of said main cylinders ports with said hammer pistons cylinder; a valve for opening the ports of both cylinders'successively; and means for operating and for limiting the movement of said valve. I I

9. In a fluid controlled drill sharpener, the combination of a pair of drill-bit clamping jaws comprising a fixed and movable aw,

said movable gaw being slidably mounted in a sup orting m'ova le' jaw, a half die on eachjaw, each half die being provided with a funnel shaped drill upsetting and sharpening recess, a beveled shoulder in each jaw, a beveled shoulder on each half die registering against the beveled shoulder of each jaw, and aboltextending through each jaw and arranged to clam each half dies beveled shoulder to the bevele shoulder of each jaw.

In testimony whereof I affix my signature in presence of two Witnesses.

JOHN GEORGELEYNER.

Witnesses E. T. S'rEVENsON, Rom. J HILL.

rame, means for moving said 4 

